CN111683398A - Low-power-consumption electric energy meter reading method and electric energy meter - Google Patents
Low-power-consumption electric energy meter reading method and electric energy meter Download PDFInfo
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- CN111683398A CN111683398A CN202010497865.9A CN202010497865A CN111683398A CN 111683398 A CN111683398 A CN 111683398A CN 202010497865 A CN202010497865 A CN 202010497865A CN 111683398 A CN111683398 A CN 111683398A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a low-power consumption electric energy meter reading method and an electric energy meter, wherein the method realizes that an MCU (micro control unit) regularly switches the working state of a wireless communication module through interaction between the MCU and the wireless communication module in the electric energy meter, switches the working state of the MCU by detecting whether an external signal contains an awakening signal, and executes a corresponding meter reading program according to the detected meter reading signal; the electric energy meter provided by the invention is used for executing the low-power consumption electric energy meter reading method; the low-power-consumption electric energy meter reading method and the electric energy meter ensure that the electric energy meter can realize the meter reading function in the power-down state, reduce the electric energy power consumption of the electric energy meter in the power-down meter reading process, prolong the service life of a power supply battery and achieve the environment-friendly and energy-saving effect.
Description
Technical Field
The invention relates to the technical field of electric energy metering, in particular to a low-power consumption electric energy meter reading method and an electric energy meter.
Background
At present, the mode of reading the meter of the electric energy meter in a power-down state is usually to enter a receiving mode through a wireless module after the electric energy meter is powered down, collect a meter reading signal frame, and enable an MCU of the electric energy meter to execute a corresponding meter reading program according to the meter reading signal frame received by the wireless module. In order to ensure that meter reading data are not missed in a power-down state, the wireless module needs to be kept in a receiving state all the time and monitors whether a meter reading signal frame exists or not in real time, so that the power consumption of a meter reading battery of the electric energy meter can be greatly increased, the service time of the battery is shortened, and the use cost of a user is increased.
Disclosure of Invention
In view of the defects of large power consumption, short battery service time and the like of the meter reading of the existing electric energy meter under the condition of power failure, the invention aims to provide the meter reading method of the low-power-consumption electric energy meter, which is used for reducing the meter reading power consumption of the existing electric energy meter under the condition of power failure, so that the meter reading mode under the condition of power failure is more energy-saving and low-carbon, the service life of a meter reading battery is prolonged, and the frequency of battery replacement and the service cost of the battery of a user are also.
In order to achieve the above and other related objects, a first aspect of the present invention provides a low power consumption electric energy meter reading method, applied to an electric energy meter having or connected to a wireless communication module, wherein the electric energy meter includes a micro control unit MCU, the MCU includes a timer, and the method includes: the MCU initializes the wireless communication module to enable the wireless communication module to enter a dormant state; the MCU starts the first timing of the timer, and simultaneously enters a first working state; when the first timing time reaches a first preset time, the MCU starts the timer to time for the second time; meanwhile, the MCU wakes up the wireless communication module to receive external signals; when the wireless communication module receives the external signal, the MCU detects whether the external signal contains the wake-up signal; if not, continuously detecting whether the external signal contains the wake-up signal or not, and returning to execute the steps until the second timing time reaches second preset time; if so, the MCU starts the third timing of the timer, and meanwhile, the MCU enters a second working state; the MCU detects whether the external signal contains a meter reading signal or not; if not, continuously detecting whether the external signal contains the meter reading signal or not, and returning to execute the steps until the third timing time reaches a third preset time; if so, the MCU executes corresponding meter reading operation according to the meter reading signal; and after the meter reading operation is finished, returning to execute the steps.
In an embodiment of the present invention, the MCU executes a corresponding meter reading operation according to the meter reading signal, including: when the meter reading signal is detected, the MCU closes the third timing of the timer, and executes and completes the corresponding meter reading operation according to the meter reading signal, so that the meter reading operation is finished; or when the meter reading signal is detected, resetting the third timing of the timer by the MCU; and after the meter reading operation is finished according to the meter reading signal, restarting the third timing of the timer by the MCU, and repeatedly executing the step until the meter reading signal is not detected, and finishing the meter reading operation.
In an embodiment of the present invention, before the MCU starts the first timing of the timer, the method further includes: the MCU initializes the timer.
In an embodiment of the present invention, the wake-up signal at least includes verification information for verifying the signal and distinguishing the signal from other signals.
In an embodiment of the present invention, the wake-up signal further includes electric energy meter identification information, where the electric energy meter identification information at least includes number information corresponding to the electric energy meter.
In an embodiment of the present invention, a signal length of the wake-up signal is smaller than a signal length of the meter reading signal.
In an embodiment of the invention, the first predetermined time is any one of 1 to 9 seconds.
In an embodiment of the invention, the second predetermined time is any one of 50 to 500 ms.
In an embodiment of the invention, the third predetermined time is any one of 0.5 to 20 min.
In an embodiment of the invention, the first predetermined time is 3s, the second predetermined time is 100ms, and the third predetermined time is 2 min.
The invention provides a low-power consumption electric energy meter reading method, which is applied to a meter reading equipment end and is suitable for reading an electric energy meter with or connected with a wireless communication module, wherein the electric energy meter comprises a Micro Control Unit (MCU), and the method comprises the following steps: before sending a meter reading signal, continuously sending a wake-up signal so that when the MCU executes the meter reading method of the low-power consumption electric energy meter according to the first aspect, the working state of the MCU is switched from the first working state to the second working state according to the obtained wake-up signal; enabling the MCU to return meter reading data corresponding to the meter reading signal through the wireless communication module according to the acquired meter reading signal; and receiving a wireless message while sending a meter reading signal, and detecting whether the received wireless message contains the meter reading data, if so, directly sending a next meter reading signal, otherwise, displaying meter reading failure.
In an embodiment of the invention, the duration of the wake-up signal is longer than the first predetermined time.
In an embodiment of the present invention, the wake-up signal at least includes verification information for verifying the signal and distinguishing the signal from other signals; and the length of the wake-up signal is less than that of the meter reading signal.
A third aspect of the present invention provides an electric energy meter comprising: the system comprises a Micro Control Unit (MCU) and a wireless communication module electrically connected with the MCU; the wireless communication module is used for receiving an external signal and sending meter reading data acquired by the MCU according to the external signal; the MCU executes the meter reading method of the low-power consumption electric energy meter of the first aspect.
As described above, the low-power consumption electric energy meter reading method and the electric energy meter of the invention have the following beneficial effects: awakening the wireless communication module regularly through the MCU, receiving and detecting an external signal, switching the working state of the wireless communication module according to whether the external signal contains an awakening signal or not, executing a corresponding meter reading program according to the detected meter reading signal, ensuring that the electric energy meter can realize the meter reading function in the power-down state, reducing the electric energy consumption of the electric energy meter in the power-down meter reading process, prolonging the service life of a power supply battery, and achieving the environment-friendly and energy-saving effects.
Drawings
FIG. 1 is a schematic flow chart illustrating a meter reading method for a low power consumption electric energy meter according to an embodiment of the present invention
Description of the element reference numerals
S101 to S106 steps
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The invention relates to a low-power consumption electric energy meter reading method and a technical principle of an electric energy meter, wherein the method comprises the following steps:
the wireless communication module is awakened regularly to receive external signals through the interaction of an MCU (microprogrammed control unit) in the electric energy meter and the wireless communication module, the MCU detects the external signal data received by the wireless communication module regularly, and when the external signals are detected to contain awakening signals, the MCU is switched from a low-power working state to a high-power working state; the MCU regularly reads and detects external signals received by the wireless communication module, and when the external signals are detected to contain meter reading signals, the MCU completes corresponding meter reading programs according to the meter reading signals; if the wireless communication module is not detected within a certain time, the MCU controls the wireless communication module to enter a dormant state, and the MCU enters a low-power state, so that the electric energy meter can realize a meter reading function in a power-down state, the electric energy consumption of the electric energy meter in the power-down meter reading process is reduced, the service life of a power supply battery is prolonged, and the environment-friendly, energy-saving and environment-friendly effects are achieved.
Example 1
The embodiment provides a low-power consumption electric energy meter reading method, which is applied to an electric energy meter with or connected with a wireless communication module; the electric energy meter comprises an MCU (microprogrammed control unit), and the MCU comprises a timer; the wireless communication module comprises a wireless communication chip; preferably, the wireless communication chip is a TICC 1101.
The wireless communication module is connected with the MCU through the SPI interface of the MCU, so that data interaction between the wireless communication module and the MCU is realized, and the MCU controls the wireless communication module to enter a dormant or awakened state.
Referring to fig. 1, a flow chart of the low power consumption electric energy meter reading method in embodiment 1 is shown. As shown in fig. 1, the low-power consumption electric energy meter reading method includes the following steps:
and S101, the MCU initializes the wireless communication module.
Specifically, the MCU sends an initialization signal to the wireless communication module, configures performance parameters of the wireless communication module, clears data in the cache of the wireless communication module, and controls the wireless communication module to enter a sleep state.
Further, when the MCU detects that the electric energy meter enters a power failure state, the low-power consumption electric energy meter reading method is started to be executed.
S102, the MCU initializes the timer.
Specifically, a timing parameter in the timer is set to an initial value. And the initial value is a preset value when the timer parameter starts to count.
It should be noted that, the step S101 and the step S102 are not limited in sequence.
S103, the MCU starts the timer to start first timing, and simultaneously enters a first working state.
Specifically, the MCU starts the timer to start first timing, so that the timer enters a first timing state; the timer continuously accumulates the timing parameters from an initial value according to a clock signal, and the accumulated value is the timing time of the timer; meanwhile, the MCU enters a first working state after the timer is started.
Wherein the first operating state is a low power operating state; in the working state, the MCU closes the operation of other peripheral equipment, and only keeps the timer in the operating state.
S104, when the first timing time reaches a first preset time and the timer triggers a first interrupt, the MCU starts the timer to start a second timing; meanwhile, the MCU wakes up the wireless communication module to receive external signals.
Specifically, the timing parameters of the timer are continuously accumulated along with the increase of the timing time, when the timing parameters reach a first overflow value corresponding to the first preset time, the timer triggers a first interrupt, and after receiving the first interrupt signal, the MCU starts the timer to start a second timing, so that the timer enters a second timing stage.
Preferably, the first preset time is any value of 1-9 s; in one embodiment, the first predetermined time is 3 s.
And when the timer starts second timing, the MCU wakes up the wireless communication module to enable the wireless communication module to be switched from the dormant state to the working state, and receives an external signal when the timer carries out the second timing.
S105, when the wireless communication module receives the external signal, the MCU detects whether the external signal contains a wake-up signal; if the wake-up signal is not detected, continuously detecting whether the external signal includes the wake-up signal, if the wake-up signal is not detected when the second timing time reaches a second preset time, returning to execute the step S101; and if the wake-up signal is detected, the MCU starts the third timing of the timer, and meanwhile, the MCU enters a second working state.
Specifically, when the wireless communication module receives the external signal, a pulse interrupt signal is sent to the MCU; and after receiving the pulse interrupt signal, the MCU reads the external signal stored in the wireless communication module through the SPI and detects whether the external signal contains a wake-up signal.
If the wake-up signal is not detected, the MCU still maintains the first working state, that is, the MCU continues to be in the low power consumption state, and the wireless communication module is in the working state, until the second timing time reaches a second preset time, the timer triggers a second interrupt, and then the process returns to S101 and continues to execute S101 to S105.
Preferably, the second preset time is any value of 50-500 ms; in one embodiment, the second predetermined time is 100 ms.
If the external signal is detected to contain the wake-up signal, the MCU starts a third timing of the timer, and meanwhile, the MCU enters a second working state to execute S106.
The wake-up signal is a wake-up frame, the data portion of the wake-up frame at least includes check information, and the check information is information for checking the wake-up signal and distinguishing the wake-up signal from other signals.
Furthermore, the data part of the wake-up frame at least comprises electric energy meter identification information to ensure that meter reading operation corresponds to the electric energy meters, and prevent the wake-up signal from generating signal receiving confusion when a plurality of electric energy meters are arranged relatively close to each other.
Furthermore, the signal length of the wake-up signal is less than that of the meter reading signal, and the signal length is fixed; compared with the meter reading signals with inconsistent signal lengths, the MCU can be ensured to finish the analysis and judgment of the signals within relatively short, predictable and relatively fixed time, so that the power consumption of the meter reading operation of the electric energy meter is further reduced. The MCU detects whether the external signal contains the implementation mode of the wake-up signal, and the implementation mode comprises the following steps: the MCU reads the external signals stored in the cache of the wireless communication module through an SPI (serial peripheral interface), and the MCU analyzes and acquires data information in the external signals; the MCU detects whether the data information contains the electric energy meter identification information and the verification information in the wake-up signal; if yes, the external signal is judged to contain the wake-up signal, otherwise, the external signal is judged not to contain the wake-up signal.
And the second working state is a higher-power working state relative to the first working state, and in the working state, the MCU is in a higher-speed running state and starts a peripheral related to the interior of the MCU.
S106, when the timer carries out the third timing, the MCU detects whether the external signal contains a meter reading signal; if the meter reading signal is not detected, continuously detecting whether the external signal contains the meter reading signal, and if the meter reading signal is not detected yet when the third timing time reaches a third preset time, returning to the step S101; and if the meter reading signal is detected, the MCU executes corresponding meter reading operation according to the meter reading signal.
Specifically, when the timer performs the third timing, the MCU controls the wireless communication module to be in a working state and receive an external signal; and the MCU reads the external signal stored in the cache of the wireless communication module after the wireless communication module receives the external signal, and detects the external signal.
If the meter reading signal is not detected, the MCU still maintains a second working state, that is, the MCU continues to be in the high power consumption state, and the wireless communication module is in the working state, until the third timing time reaches the third preset time, the timer triggers a third interrupt, and then the process returns to S101 and continues to execute S101 to S106.
If the external signal is detected to contain a meter reading signal, the MCU executes corresponding meter reading operation according to the meter reading signal, and returns to execute S101 after the meter reading operation is finished; execution continues with S101 to S106.
The meter reading operation is that the MCU executes a meter reading program according to the meter reading signal to obtain meter reading data, and sends the meter reading data to the wireless communication module, so that the wireless communication module sends the meter reading data.
Preferably, the third preset time is any value of 0.5-20 min. In one embodiment, the third predetermined time is 2 min.
Further, the MCU executes a corresponding meter reading operation according to the meter reading signal, and returns to execute S101 after the meter reading operation is finished, including:
when the meter reading signal is detected, the MCU closes the third timing of the timer, executes corresponding meter reading operation according to the meter reading signal, finishes the meter reading operation, and returns to S101 after the meter reading operation is finished; or when the meter reading signal is detected, resetting the third timing of the timer by the MCU; after the meter reading operation is executed, restarting the third timing of the timer by the MCU; meanwhile, the MCU detects whether the external signal contains the meter reading signal again; if yes, the step is executed again; if not, the step is exited, and after the meter reading operation is finished, the step returns to the step of executing S101.
It should be noted that the timer may be one timer, or may be multiple different timers, that is, the first timing, the second timing, and the third timing may be sequentially executed on the same timer, or may be respectively executed on different timers. In this embodiment, the timers are different timers, and the timer used for the second timing is a microsecond-level timer with higher precision, which is different from the timers used for the first timing and the third timing. In another embodiment, when the timer is a single timer, that is, the first timing, the second timing and the third timing are all executed in a single timer, the timing manner of the timer includes: the second timing is that the timing parameter continues to accumulate and time on the basis of the first timing time until a second overflow value corresponding to a second preset time is reached; similarly, the third timing is to continue to perform accumulated timing on the timing parameter based on the second timing time until reaching a third overflow value corresponding to a third preset time. Or, when the timer is a single timer, that is, the first timing, the second timing, and the third timing are all executed in the single timer, the timing manner of the timer may further include: the second timing is that the timing parameter is reset and then the accumulated timing is restarted until a second overflow value corresponding to second preset time is reached; similarly, the third timing is that the accumulated timing is restarted after the reset of the timing parameter until a third overflow value corresponding to a third preset time is reached.
It should be noted that the timer may include a timer outside the MCU in addition to the timer included in the MCU.
It should be noted that the low-power consumption electric energy meter reading method provided by the invention is not only suitable for the electric energy meter reading process, but also suitable for the electric energy meter configuration process, namely, the meter reading signal is replaced by a configuration signal, and the low-power consumption parameter configuration process of the electric energy meter in a power failure state can also be realized.
In the embodiment, the meter reading operation of the electric energy meter under lower power consumption is realized through the interaction between the MCU in the electric energy meter and the wireless communication module; the wireless communication module is switched between a low power consumption state and a higher power consumption state at regular time through the MCU, so that the power consumption of the wireless communication module is reduced; whether the external signal contains the awakening signal or not is detected, so that the MCU can be guaranteed to finish analysis and judgment of the signal within relatively short, predictable and relatively fixed time, the meter reading function of the electric energy meter in a power-down state is realized, the electric energy consumption of the electric energy meter in the power-down meter reading process is reduced, and the service life of a power supply battery are prolonged. In addition, compared with the prior art that the meter reading frame is directly read and analyzed in the meter reading operation, the time required by reading and analyzing can be more fixed by setting the wakeup frame before the meter reading frame, so that the method can be conveniently applied to different electric energy meters or meter reading communication protocols, and the application range and the use convenience of the method are improved.
Example 2
A low-power consumption electric energy meter reading method is applied to a meter reading equipment end and is suitable for reading an electric energy meter with or connected with a wireless communication module, wherein the electric energy meter comprises an MCU with a timer, and the method comprises the following steps: before sending a meter reading signal, the meter reading equipment continuously sends a wake-up signal so that when the MCU executes the low-power-consumption electric energy meter reading method, the working state is switched from the first working state to the second working state according to the read wake-up signal received by the wireless communication module; and enabling the MCU to execute meter reading operation according to the read meter reading signal received by the wireless communication module, and further returning meter reading data corresponding to the meter reading signal through the wireless communication module.
The wake-up signal is a wake-up frame, the data portion of the wake-up frame at least includes check information, and the check information is information for checking the wake-up signal and distinguishing the wake-up signal from other signals.
Further, the duration of sending the wake-up signal is longer than the first preset time.
Furthermore, the data part of the wake-up frame at least comprises electric energy meter identification information to ensure that meter reading operation corresponds to the electric energy meters, and prevent the wake-up signal from generating signal receiving confusion when a plurality of electric energy meters are arranged relatively close to each other.
Furthermore, the signal length of the wake-up signal is less than that of the meter reading signal, and the signal length is fixed; compared with the meter reading signals with inconsistent signal lengths, the MCU can be ensured to finish the analysis and judgment of the signals within relatively short, predictable and relatively fixed time, so that the power consumption of the meter reading operation of the electric energy meter is further reduced.
And while sending a meter reading signal, the meter reading equipment receives an external wireless message and detects whether the received wireless message contains meter reading data, if the meter reading data is detected, the meter reading equipment directly sends a next meter reading signal, and if the meter reading data is not detected, the meter reading equipment displays that the meter reading fails.
Further, if the meter reading data is not detected, the meter reading equipment retransmits the awakening signal, continuously transmits the awakening signal and then transmits the meter reading signal, namely, the meter reading signal is repeatedly transmitted.
Example 3
The present embodiment provides an electric energy meter, including: the system comprises a microcontroller MCU and a wireless communication module electrically connected with the MCU. The communication module is a wireless communication chip and is used for receiving an external signal and sending meter reading data acquired by the MCU according to the external signal; the MCU executes the steps of the low-power consumption electric energy meter reading method so as to realize the meter reading interaction process between the electric energy meter and the external meter reading equipment.
Preferably, the wireless communication chip is a TICC1101 chip.
In summary, according to the low-power consumption electric energy meter reading method and the electric energy meter provided by the invention, through interaction between the MCU in the electric energy meter and the wireless communication module, and the MCU regularly switches the working state of the wireless communication module, switches the working state of the electric energy meter according to whether the external signal contains the wake-up signal, and executes the corresponding meter reading program according to the detected meter reading signal, the electric energy meter reading function of the electric energy meter in a power-down state is ensured, and simultaneously, the electric energy consumption of the electric energy meter in the power-down meter reading process is reduced, the service life of the power supply battery is prolonged, and the environmental protection effect of environmental protection and energy saving is achieved. In addition, the method can be conveniently applied to different electric energy meters or meter reading communication protocols, is convenient to use, and has a wide application range.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (14)
1. The meter reading method of the low-power consumption electric energy meter is characterized by being applied to the electric energy meter with or connected with a wireless communication module, wherein the electric energy meter comprises a Micro Control Unit (MCU), the MCU comprises a timer, and the method comprises the following steps:
the MCU initializes the wireless communication module to enable the wireless communication module to enter a dormant state;
the MCU starts the first timing of the timer, and simultaneously enters a first working state;
when the first timing time reaches a first preset time, the MCU starts a second timing of the timer; meanwhile, the MCU wakes up the wireless communication module to receive external signals;
when the wireless communication module receives the external signal, the MCU detects whether the external signal contains a wake-up signal; if not, continuously detecting whether the external signal contains the wake-up signal or not, and returning to execute the steps until the second timing time reaches second preset time; if so, the MCU starts the third timing of the timer, and meanwhile, the MCU enters a second working state;
the MCU detects whether the external signal contains a meter reading signal or not; if not, continuously detecting whether the external signal contains the meter reading signal or not, and returning to execute the steps until the third timing time reaches a third preset time; if so, the MCU executes corresponding meter reading operation according to the meter reading signal; and after the meter reading operation is finished, returning to execute the steps.
2. The low-power consumption electric energy meter reading method according to claim 1, wherein the MCU executes corresponding meter reading operation according to the meter reading signal, and the method comprises the following steps:
when the meter reading signal is detected, the MCU closes the third timing of the timer, and executes and completes the corresponding meter reading operation according to the meter reading signal, so that the meter reading operation is finished; alternatively, the first and second electrodes may be,
when the meter reading signal is detected, the MCU resets and resets the third timing of the timer; and after the meter reading operation is finished according to the meter reading signal, restarting the third timing of the timer by the MCU, and repeatedly executing the step until the meter reading signal is not detected, and finishing the meter reading operation.
3. The meter reading method for the low-power consumption electric energy meter according to claim 1, wherein before the MCU starts the first timing of the timer, the method further comprises: the MCU initializes the timer.
4. The low-power consumption electric energy meter reading method according to any one of claims 1 to 3, wherein the wake-up signal at least contains verification information for verifying the signal and distinguishing the signal from other signals.
5. The low-power-consumption electric energy meter reading method according to claim 4, wherein the wake-up signal further comprises electric energy meter identification information, and the electric energy meter identification information at least comprises number information corresponding to the electric energy meter.
6. The meter reading method for the low-power-consumption electric energy meter according to claim 4, wherein the signal length of the wake-up signal is smaller than the signal length of the meter reading signal.
7. The meter reading method for the low-power-consumption electric energy meter according to claim 1, wherein the first preset time is any one of 1-9 s.
8. The meter reading method for the low-power-consumption electric energy meter according to claim 1, wherein the second preset time is any value of 50-500 ms.
9. The meter reading method for the low-power-consumption electric energy meter according to claim 1, wherein the third preset time is any one value of 0.5-20 min.
10. The meter reading method for the low-power-consumption electric energy meter according to claim 1, wherein the first preset time is 3s, the second preset time is 100ms, and the third preset time is 2 min.
11. The utility model provides a low-power consumption electric energy meter method of checking meter, is applied to meter reading equipment end, its characterized in that is applicable to and has or is connected with the electric energy meter of wireless communication module and checks meter, wherein, the electric energy meter includes little the control unit MCU, the method includes:
before sending a meter reading signal, continuously sending a wake-up signal to enable the MCU to switch the working state of the MCU from the first working state to the second working state according to the obtained wake-up signal when the MCU executes the low-power consumption electric energy meter reading method according to any one of claims 1 to 10; enabling the MCU to return meter reading data corresponding to the meter reading signal through the wireless communication module according to the acquired meter reading signal;
and receiving a wireless message while sending a meter reading signal, and detecting whether the received wireless message contains the meter reading data, if so, directly sending a next meter reading signal, otherwise, displaying meter reading failure.
12. The meter reading method for the low-power-consumption electric energy meter according to claim 11, wherein the duration of sending the wake-up signal is longer than the first preset time.
13. The meter reading method for the low-power-consumption electric energy meter according to claim 12, wherein the wake-up signal at least contains verification information for verifying the signal and distinguishing the signal from other signals; and the length of the wake-up signal is less than that of the meter reading signal.
14. An electric energy meter, comprising: the system comprises a Micro Control Unit (MCU) and a wireless communication module electrically connected with the MCU; the wireless communication module is used for receiving an external signal and sending meter reading data acquired by the MCU according to the external signal; the MCU executes the low-power consumption electric energy meter reading method according to any one of claims 1 to 10.
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